Attached monitor does not wake from sleep mode

Solution Verified - Updated -

Issue

  • Cannot bring monitor out of sleep mode by moving mouse or pressing keyboard keys.
  • Issue is always reproducible when system is left unused for an extended period of time (2 or more hours).

Environment

  • Red Hat Enterprise Linux 6
  • xorg-x11-drv-mga-1.6.3-6.el6

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